It’s the gases ___ natural gas and the burning of coal give off ____ add to the overheating of the earth.
| A．that; what | B．that; that | C．which; which | D．that; which |
The cakes are delicious . He’d like have ______third one because _____second one is rather too small.
| A．a, a | B．the . the | C．a ,the | D．the ,a |
One way to understand thousands of new words in gain _____good knowledge of basic word formation.
| A．/ | B．the | C．a | D．one |
Jumping out of ____airplane at ten thousand feet is quite _____exciting experience.
| A．/, the | B．/, an | C．an. an | D．the, the |
I don’t like talking on ______telephone ; I prefer writing ____letter.
| A．a, the | B．the. / | C．the ,the | D．A ,/ |
The sign reads “in ease of___ fire ,break the glass and push _____red button”
| A．/,a | B．/,the | C．the ,the | D．a ,a |